416 COMPOSITiE. Artemisia. 



flattish or convex, naked or villous. Achenia obovoid, with a small epigy- 

 nous disk, destitute of pappus. — Herbs or shrubby (bitter and mostly aroma- 

 tic) plants; with alternate, usually pinnately cleft or dissected leaves, and 

 small spicate or racemose heads; the spikes usually paniculate. Corolla 

 yellow or purplish. 



§ 1. Receptacle naked : heads heterogamous ; the disk-Jlowers sterile.— 

 Dracunculus, Bess. (Oligosporus, Less.) 



1. A. pycnocephala (DC.) : sufTruticose (ex Bess.) ; stems ascending or 

 erect ; leaves crowded, silvery-tomentose ; the lower tripinnately divided, 

 with linear lobes; the upper with somewhat ovate lobes; heads spicate or 

 spicate-paniculate, crowded, hemispherical, many-flowered ; scales of the 

 involucre elliptical, rather obtuse, silky-villous, with broad scarious margin's; 

 sterile flowers hairy at the summit; the fertile glabrous. — DC. prodr. 6. 

 p. 99; Bess, in Linncea, 15. p. 102. Oligosporus pycnocephalus, Less, in 

 Linneea, 6. p. 524. 



St. Francisco, California, Chamisso, fide Besser, I. c. Inadvertently given 

 by De Candolle as a Siberian species. 



2. A. dracunculoides (Pursh) : perennial, mostly sufTruticose, erect, branch- 

 ed, more or less canescently pubescent when young; cauline leaves nar- 

 rowly linear, entire, or the lower, as well as the radical, often 3-cleft; heads 

 small, globose, nodding, in paniculate racemes ; scales of the involucre with 

 scarious margins; the inner roundish, the outermost oblong. — Pursh! fi. 2. 

 p. 742. A. Dracunculus, Pursh, fl. 2. p. 521. A. cernua, Nutt.I gen. 2. 

 p. 143. A. dracunculoides var. glauca, Bess..' in Hook, fl. Bor.-Am. 1. p. 

 326. A. glauca /?. fastigiata, Bess, in DC. prodr. 6. p. 97. A. inodora. 

 Hook. Sf Am. hot. Beechey, p. 150 ? 



a. tenuifolia: canescent or glabrous; leaves elongated, narrowly linear, 

 attenuate at both ends. — A. dracunculoides, Pursh! I. c. (fide spec, cult.) 



/?. hrevifolia : somewhat cinereous, or at length glabrous (either herbaceous 

 or sufTruticose) ; leaves short, narrowly lanceolate-linear, acute ; the lower 

 cauline 3-cleft, the radical sometimes 1-2 pinnately parted 1 — A. Nuttalliana, 

 Bess, in Hook. I. c, 8f in DC. I. c. p. 96. 



y. incana: sufTruticose, silky-canescent throughout when young, but be- 

 coming glabrous with age ; cauline leaves short, linear, obtusish, frequently 

 3-cleft (inflorescence and flowers unknown). 



Missouri! common from near St. Louis to the Rocky Mountains! and 

 north to the Saskatchawan ! (a. & ji.) y. Sandy banks of Jacques River, 

 &c., Mr. Nicollet! — A somewhat polymorphous species, nearly allied in 

 some of its forms to A. Dracunculus. Leaves varying from 1 to 4 inches in 

 length, seldom more than one or two lines in width. — Both Pursh's name, 

 and that imposed by Nuttall, seem to have been overlooked by Besser and 

 De Candolle. 



3. A. borealis (Pallas) : perennial, herbaceous, caespitose, silky-villous or 

 nearly glabrous; stem simple; leaves all but the uppermost petioled ; the 

 radical linear-lanceolate, entire at the base, 3-5-cleft at the apex, or 1-2-pin- 

 nately parted, with the lobes lanceolate or linear; the cauline 2-pinnately 

 divided, with linear lobes ; the floral elongated, undivided at the base [often 

 entire]'; heads spicate or racemose, paniculate, hemispherical ; scales of the 

 involucre elliptical, colored on the back. Bess, in Hook. S^- DC. — Pall. 

 itin. 3, (. Hh.f. 1 ; Less. in. Linn/ea, 6. p. 211 ; Richards.! appx. Frankl. 

 journ. ed. 2. p. 30; Bess.! in Hook. fl. Bor.-Am. 1. p. 326 ; DC. ! prodr. 

 6.p.9Q. 



